Specification: Material:PS Unit Dimension:30*30*25mm Shape:flower Power supply:2*CR2032 batteries(replaceable) Battery last time:30-70hours Voltage:DC6V Switch: twist on/off Function:Steady on Features:submersible,flameless,high safety Operation: Take the insulating strip off the light To activate these lights simply twist the plastic light case closed to form a seal and activate your light.Twist in the opposite direction to turn off. Remark:Please note the +/-polarity when you replace the battery. The +polarity should on the down side. Warning: This is not a toy! Please keep out of reach of children when use,in case they put the light into mouth.